1// -*- C++ -*-
2
3// Copyright (C) 2005 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
31
32// Permission to use, copy, modify, sell, and distribute this software
33// is hereby granted without fee, provided that the above copyright
34// notice appears in all copies, and that both that copyright notice and
35// this permission notice appear in supporting documentation. None of
36// the above authors, nor IBM Haifa Research Laboratories, make any
37// representation about the suitability of this software for any
38// purpose. It is provided "as is" without express or implied warranty.
39
40/**
41 * @file erase_if_example.cpp
42 * A basic example showing how to use erase_if.
43 */
44
45// For various associative containers.
46#include <ext/pb_assoc/assoc_cntnr.hpp>
47// For cout, endl.
48#include <iostream>
49// For assert.
50#include <cassert>
51
52struct between : public std::unary_function<
53  std::pair<const int, char>,
54		 bool>
55{
56  between(int b, int e) : m_b(b),
57			  m_e(e)
58  { }
59
60  inline bool
61  operator()(std::pair<const int, char>& r_val)
62  {
63    return (r_val.first >= m_b&&  r_val.first < m_e);
64  }
65
66private:
67  const int m_b;
68  const int m_e;
69};
70
71template<class Cntnr>
72void
73some_op_sequence(Cntnr c)
74{
75  assert(c.empty());
76  assert(c.size() == 0);
77
78  for (int i = 0; i < 100; ++i)
79    c.insert(std::make_pair(i, static_cast<char>(i)));
80
81  assert(c.size() == 100);
82
83  /* Erase all values whose key is between 10 (inclusive)
84   * and 90 (non-inclusive).
85   */
86  c.erase_if(between(10 , 90));
87
88  assert(!c.empty());
89  assert(c.size() == 20);
90}
91
92int
93main()
94{
95
96  /*
97   * Perform operations on a list-update set.
98   */
99  some_op_sequence(pb_assoc::lu_assoc_cntnr<int, char>());
100
101  /*
102   * Perform operations on a collision-chaining hash set.
103   */
104  some_op_sequence(pb_assoc::cc_hash_assoc_cntnr<int, char>());
105
106  /*
107   * Perform operations on a general-probing hash set.
108   */
109  some_op_sequence(pb_assoc::gp_hash_assoc_cntnr<int, char>());
110
111  /*
112   * Perform operations on a red-black tree set.
113   */
114  some_op_sequence(pb_assoc::tree_assoc_cntnr<int, char>());
115
116  /*
117   * Perform operations on a splay tree set.
118   */
119  some_op_sequence(pb_assoc::tree_assoc_cntnr<
120		   int,
121		   char,
122		   std::less<int>,
123		   pb_assoc::splay_tree_ds_tag>());
124
125  /*
126   * Perform operations on a splay tree set.
127   */
128  some_op_sequence(pb_assoc::tree_assoc_cntnr<
129		   int,
130		   char,
131		   std::less<int>,
132		   pb_assoc::ov_tree_ds_tag>());
133}
134